GEMS file format support, experimental

jpcima commented 6 years ago

I implement read support for BNK and PAT files.

It's to test, as some instruments are sounding good and some not so much. The values shown in both editors seem matching for most.

no support of "CH3" stuff
no support of LFO on/frequency (which GEMS takes as per-instrument)
no support of disabling Left/Right
I took GEMS "SLevel" as "Sustain", and GEMS "Sustain" as "Decay2". Check it
I'm not sure about interpretation of Detune (GEMS has -3..+3) ~~which I converted to 0..7 range adding 3~~ using raw values of file
conversions of operator orders to verify...
to implement "Disable" flag on operator I chose to override level with 127

Wohlstand commented 6 years ago

LFO Enabled and frequency is the chip global option, and per-instrument is only possible to set sensitivity. Or maybe some workaround or hidden feature which allows to set channel-individual LFO enablibity or frequency... @nukeykt, what do you think about of this? Does OPN2 chip support per-instrument individual LFO-enable and LFP frequency or not?

Wohlstand commented 6 years ago

Anyway, I'll review and polish this at my home...

nukeykt commented 6 years ago

You can set LFO depth per channel using B4 register. LFO frequency is a global parameter.

Wohlstand commented 6 years ago

So, I did right that I made LFO Enable and LFO Frequency to be bank-global rather per-instrument parameters.

Wohlstand / OPN2BankEditor

GEMS file format support, experimental #24